The Alas plan file is a Markdown text file with a special format. So, you can use any text editor to edit the file, such as Vim, Emacs, Nano, TextMate or VS Code.

It can be convenient to use a plugin for your editor that supports checking and unchecking tasks ([ ], [X]), such as Vimwiki or kakoune-wiki.

Note that you can use the Alas format for your plan even without the Alas CLI tool.